Burner control apparatus



Oct. 22, 1940. SCHVUMANN 2,219,118

' BURNER CONTROL APPARATUS Filed March 11, 1957 2 Sheets-Shet l 1N\ ENTOR. A L FRED F \SCHUMANN Oct. 22, 1940. ISCHUMANN 2,219,118

- BURNER CONTROL APPARATUS I Filed March 11, 1937 2 Sheets-Sheet 2 INVENTOR. A L FRED F. SCHUMANN a ATTORNEY.

Patented a., 22,1940

UNITED STATES PATENT OFFICE BURNER CONTROL APPARATUS Alfred F. Schumann, Baltimore, Md., assignor to Hauck Manufacturing Company, Brooklyn, N. Y,. a corporation of New York Application March 11, 15537, Serial No. 130,420

Claims. (01. 158-1) The invention relates to mixer apparatus suit initially setting the flow of one of the fluids to 'able for the intimate mixture of various fluids, afford the desired volume thereof, as by varying particularly as fuels in a gaseous, liquid, and even its supply pressure. powdered-solidstate, for example, as in the mix- The nature of the invention, however, will best 5 ing, or atomizing, of a combustible oil or gas or be understood when described in connection with 5 powdered fuel with air or steam or with a further the accompanying drawings, in which: combustible gas. Fig. 1 is an end elevation of the novel apparatus The invention has for an object the provision with a portion of the fuel-supplying valve broken ,of mixer apparatus whereby, within the range away.

0 of action of the mixer, a predetermined ratio Fig. 2 is a plan viewthereof with a portion of may be maintained between two fluids supplied the burner member broken away. thereto, for example, in the case of burner appa- Referring to the drawings, the burner member ratus to afford and maintain under variable outis shown to consist of a suitable elongated casing put the desired atmosphere in a combustion or body having a longitudinally disposed chamchamber, thereby avoiding any danger of a her It] into which the atomizing gaseous medium, 16 change, say from an oxidizing to a reducing conas, air under requisite pressure, is to be supplied. ditlon, or from an efficient to an inefficient flame. The casing is provided with a removable tip ll A further object of the invention is to provide a having the delivery outlet l2 located axially with burner apparatus and means for maintaining a respect to the casing.

20 predetermined pressure upon one of the fluids, Fitting coaxially within the body is the fuel 20 with means admitting of the manual adjustment supply nozzle 13 which extends from the rear of of the mixer apparatus in-a'rn'anner whereby the the casing to the outlet end thereof, terminating selected ratio between the fluids is not changed in a head 14 provided with circularly disposed Lthroughout the range of variation of the total radial outlets |5,-the nozzle being bored axially' supply or output; also to permit of a change in to afford communication to these outlets and de- 25 the initial supply of the one fluid to alter the signed to connect, for example, through a pipe l6 characteristic of the discharge. or the like with a fuel supply valve I! which may Still another object of the invention is to afford be, rigidly attached to the burner casing, as by a a system of control which will admit of ready bracket I8.

adjustment of the range of output of such burner Intermediate the casing and nozzle member 30 apparatus, as well as the particular output at and axially adjustable therein is a sleeve 20 havwhichthe adjusted range of operation shall coming peripheral openings 2| to admit air from the mence. interior of the casing to the interior of said sleeve In carrying out the invention, for example as and about the nozzle outlets IS, the sleeve exembodied in burner apparatus, there is comtending beyond said outlets and being provided 35 bined with a suitableburner member having an with an outlet 22 for mixed fuel and air. The-said adjustable discharge opening and means for sleeve outlet 22 flares toward the delivery outlet varying the effective area thereof in a manner l2 of the casing and terminates in juxtaposition to afford a predetermined flow characteristic of thereto. The inner surface of this sleeveprovides the discharge of one fluid therethrough, a valve a constricted annular portion or throat 23 afford 40 for supplying fuel to the discharge means, said ing a secondary orifice about the neck of the valve being of a nature to afford a similar flow nozzle, the surface immediately in advance of and characteristic succeeding said constricted portion flaring in Provision is made, also, for manually establishopposite directions. The design of the orifice,

5 ing the desired port area ratio between the valve together with a further air orifice hereinafter and the burner discharge openings, and to indescribed, is such that a predetermined flow sure the maintenance of a constant pressure upon characteristic, for example a straight line flow the fluids to be mixed, as in securing ample cacharacteristic, will be attained in the delivery of pacity in the medium supplying mains to sub- .the gaseous medium.

stantially the point of use. Regulating means for The periphery of the said sleeve, furthermore, 50 two separate fluids are so controlled that a preis separated from the casing and forms with the determined ratio between the fluids is constantly delivery end thereof a tapering annular or primaintained throughout the range of operation of mary orifice 24 contracting toward the outlet l2, the apparatus, the range also being readily adwhich orifice may be varied in cross-sectional .iustable; and the c m natio perm s, also, of area in accordance with axial adjustment of the along rod 55. This will position the respecute arms 25 and ll of the burner-{and valve to secure the particular openings desired, whereupon'fb'y" said sleeve, which, to this end, has a sliding fit through the rear portion of the casing and about the inner end of the nozzle member. Provision is made for axially displacing the sleeve as through the angular movement of anarm 25 extending from acollar 26 which is connected to the end of said sleeve, opposite its outlet, through a pin 21 operating in a helical slot '28 formed in an extension of the casing, the head of said pin passing into a. slot 29 formedin the collar 26. Therefore, by angularly moving the said collar through thearm 25, the sleeve 20 will be correspondingly reciprocate-d toward and away from the outlet l2.

The advance and retraction of the sleeve is to occur simultaneously with variation in the fuel supplied to the burner, as from the valve ll. This valve may consist of any suitable fuelmetering' valve having a,' predetermined flow characteristic such as a straight line flow characteristic and conforming to the flow-characteristic of the burner. There is attached to the valve stem 40 of the valve an arm 4| angularly movable, as hereinafter set forth, to adjust the port area of the valve for regulating the rate of fuel supply by said valve to'the burner member. Moreover, in the fuel supply pipe 42 fromwhich the fuel is supplied to the valve from a suitable source (not shown), there is introduced means for maintaining a predetermined pressure of the fuel supplied. Thus, there may be included in the pipe-line ,42 a pressure-reducing valve 43 embodying an adjustable tensioning means such as the spring for setting the valve to supply the fuel at the desired pressure, which pressure may be adjusted by means of an externally projecting stud 45 extending within the valve body and bearing upon said spring.

As hereinbefore noted, the invention contemplates the simultaneous operation of both of the control means for the burner and valve, respectively, and in a manner such that uniform angular movement will be" impartojtto their respective arms 25 and H to maintain thereby a predetermined ratio between the atomizing medium supplied to the burner and the fuelsupplied thereto. Thus, the two said arms are linked together at like distances from their respective axes of oscillation as by means of a link 50; and provision is made for moving this link longitudinally as, for example, from a shaft 5| having suitable operating means such as a handle 52 for rocking the same. This shaft, through intermediateimech anism including a crank 53 secured'to vtlt shaft and a block 54 adjustable on the crank and secured to the free end of a rod 55, imparts a suitable throw to the said rod whose other end is adjustably secured in a block 58, swivelled to the link 50 connecting the arms 25 and 4|.

In order to change-the throw of crank '53, the same is provided with a slot 51 in which is fitted a pin extending laterally from the head "a:

By sliding this pin along the slot and adjusting the rod 55 in block 58, and then securing said rod to the block in the adjusted position as by means of a set screw 59, the desired range of operation will be determined. Moreoven'it will be appreciated that the particular point-at which such operation is initiated may also adjusted by'flrst setting the link so througlii. liding of. block It locking the block 50 to rod 55 the output of atom:

A prising in combination a fixed tubular discharge outlet an ized mixture may be varied through operation of the handle II, as hereinbefore set forth.

By this expedient, not only may the mixer apparatus for the two fluids be operated .to vary the total supply or output from any particular 5 point, while maintaining constant the ratio between the iiuids, but the initial supply of the one fluid may be set as desired to alter the characteristic of the discharge. Moreover, the actual range of control may be regulated as by the adjustment of the throw of the crank, as hereinbefore set forth.

I claim:

1. Apparatus of the nature set forth, coml5 element for fluid, having connection with a source of air and provided with an axial outlet, a movable sleeve mounted coaxially within the discharge element, its one end affording with the outlet an annular discharge area, means connect ed with the sleeve to adjust'the same longitudinally for changing the effective discharge area. a valve provided with a port communicating with; the discharge element and with a source of fluid fuelsupply, means to adjust the effective port area, means in advance of said valve for maintaining constant a predetermined pressure on the fuel supplied to the valve, and means connecting said two adjusting means to each other for imparting simultaneously thereto movement of like angular amount to change in the same sense the respective areas and the discharge of both fuel and air through the said outlet of the dis-' charge element.

2. Apparatus of the nature set forth, compris- 35 ing in combination a fixed tubular discharge element for fluid, having connection with a source of-air and provided with an axial outlet, a movable sleeve mounted coaxially within the discharge element, its one end affording with the outlet an annular discharge area, angularly movable means connected with the sleeve to adjust the same longitudinally for changing the effective discharge area, a valve provided with a port communicating with thedischarge element and with 5 a source of fuel supply, angulai'ly movable means the outlet of the discharge element. v v

3. Apparatus according to 2 and, I ooterize'd by the provision of meansfor manually the effective port area independently of 60 movement of the connectingmeana.

4. Apparatus according to claim 2 characterized lav t e provision of means for extent of angular "movement ofsaid conrf t 5. Apparatus of the natureset-forth, llhvgomp p i gh 13 4 I ment'yfor'fiuidrha ion with a source of assembled-game cu lets-move able sleeve *i'nibun'ted' cbaxiallyl within the dis 70 m 4a i -itee wnaisfi oimahz marmseharge area, an aligularly' movable; ,armand intermediate mechanism connecting'the same to the sleeve for adjusting the latter to change the eifective discharge area. a TI valve provided with a port communicating with the discharge element and with a source of fuel supply. an angularly movable arm connected with the valve to adjust its eflective port area, means 5 in advance 0! said valve for maintaining constant a predetermined pressure on the iuel supplied to the valve, a longitudinally adjustable rod connecting said arms to each other at equal distances from their respective axes of oscillation, and a crank tor imparting simultaneously to both arms a throw to maintain a predetermined ratio between the fuel and air discharged through the outlet of the discharge element. toiether with 5 means for setting the throw of the crank. 

